Merge audio_processing changes.

R=aluebs@webrtc.org, bjornv@webrtc.org
BUG=

Review URL: https://webrtc-codereview.appspot.com/32769004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7893 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_processing/agc/pitch_internal_unittest.cc

@@ -0,0 +1,50 @@
+/*
+ *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/modules/audio_processing/agc/pitch_internal.h"
+
+#include <math.h>
+
+#include "gtest/gtest.h"
+
+TEST(PitchInternalTest, test) {
+  const int kSamplingRateHz = 8000;
+  const int kNumInputParameters = 4;
+  const int kNumOutputParameters = 3;
+  // Inputs
+  double log_old_gain = log(0.5);
+  double gains[] = {0.6, 0.2, 0.5, 0.4};
+
+  double old_lag = 70;
+  double lags[] = {90, 111, 122, 50};
+
+  // Expected outputs
+  double expected_log_pitch_gain[] = {-0.541212549898316, -1.45672279045507,
+      -0.80471895621705};
+  double expected_log_old_gain = log(gains[kNumInputParameters - 1]);
+
+  double expected_pitch_lag_hz[] = {92.3076923076923, 70.9010339734121,
+      93.0232558139535};
+  double expected_old_lag = lags[kNumInputParameters - 1];
+
+  double log_pitch_gain[kNumOutputParameters];
+  double pitch_lag_hz[kNumInputParameters];
+
+  GetSubframesPitchParameters(kSamplingRateHz, gains, lags, kNumInputParameters,
+                              kNumOutputParameters, &log_old_gain, &old_lag,
+                              log_pitch_gain, pitch_lag_hz);
+
+  for (int n = 0; n < 3; n++) {
+    EXPECT_NEAR(pitch_lag_hz[n], expected_pitch_lag_hz[n], 1e-6);
+    EXPECT_NEAR(log_pitch_gain[n], expected_log_pitch_gain[n], 1e-8);
+  }
+  EXPECT_NEAR(old_lag, expected_old_lag, 1e-6);
+  EXPECT_NEAR(log_old_gain, expected_log_old_gain, 1e-8);
+}